Rotary broom making machine



Oct. 11, 1955 w. H. SEAVEY ET AL 2,720,423

ROTARY BROOM MAKING MACHINE Filed July 9, 1951 251'16615-Sh6e1 l V E'I'l 2 o o 4 2e 29 I i 34B 5 I I i i 0 H I 6 0 3 20 o s M 0 o 'n w lo HIHIM o 0 ll MI INVE T IAM H. Y R CLAUDE D. JACKSON WINFRED J. MULLINS ATTO RNEY Oct. 11, 1955 Filed July 9, 1951 W. H- SEAVEY ET AL ROTARY BROOMMAKING MACHINE H MI ||||H INVENTOR. WILLIAM H. SEAV'EY YCLAUDE D.JACKSON WINERED J. MULLINS AT TORNEY 2 Sheets-Sheet 2 United StatesPatent ROTARY BROOM MAKING MACHINE William H. Seavey, Claude D. Jackson,and Winfred J.

Mullins, Eugene, Oreg.; Jessie M. Jackson, administratrix of said ClaudeD. Jackson, deceased, assignors to M. R. Lillengreen, Seattle, Wash.

Application July 9, 1951, Serial No. 235,704

Claims. (Cl. 300-14) This invention relates to rotary broom makingmachines and is particularly adapted for applying bristles to the hubsof rotary brooms used in street cleaning machines and the like.

The primary object of the invention is to provide a bristle feedingmechanism for feeding the bristles on to the hub of the broom underneaththe bristle binding cable automatically.

In the applying of the bristles to the hub of the broom, it is necessaryto maintain the bristles in a definite predetermined arrangementrelative to the hub and the binding cable applying the bristles to thesaid hub. Our new and improved feeding mechanism accomplishes thisobject entirely automatically.

These and other incidental objects will be apparent in the drawings,specification and claims.

Referring to the drawings:

See

ing mechanism is supported by the movable carriage 13, which is mountedto the tracks 14 by way of the trunnion wheels 15, best illustrated inFigure 4. Hanger bars 16 extend down from the carriage and connect tothe feeding table supporting the same in a predetermined positionrelative to the broom hub and the take up roller.

Extending downwardly from thetable 12 is a bracket 17 for supporting afeeding wheel 18. This wheel engages the grooves 19 of the hub of thebroom, as best illustrated in Figures 4 and 6, and as the broom hub isrevolved this feeding roller moves the feed mechanism longitudinally ofthe machine at the same rate of speed as the pitch of the grooves 19 onthe broom hub, the object of which will be more fully described later.

Extending beyond the end of the feeding table 12 are flat bars 21forming guides, as best shown in Fig. 3.

1 These bars have a ninety degree twist formed between Figure 1 is aplan view of a rotary broom making machine.

. Figure 2 is an enlarged detailed fragmentary view, taken on line 2-2of Figure 4, looking in the direction indicated.

Figure 3 is a fragmentary perspective view of the bristle feeding table,including the feeding belt supporting brackets.

Figure 4 is an end sectional view, taken on line 4-4 of Figure 1.

Figure 5 is a side view of Figure 1.

Figure 6 is a fragmentary plan view of the feed roller in relation tothe hub of the broom, taken on line 66 of Figure 4.

Figure 7 is a detail sectional view of one of the driving rollers forthe feeding belts.

Referring more specifically to the drawings:

Our new and improved rotary broom making machine consists of a framework1 for supporting the broom hub 2 and the take up roll 3. The hub of thebroom 2 is so constructed as to be removably mounted to the shaft 4,which in turn is journalled within bearings 5.

The take up drum 3 is permanently journalled within the bearings 6, andis also of well known practice. The shaft 4, including the broom hub 2are rotated by the motor 7, transmission 8 and the drive chain 9. Thetake up drum 3 is driven from the transmission 8 by the chain 10. Whenthe hub 2 is having the bristles applied thereto, it is driven by thetransmission while the take up drum 3 is permitted to idle transferringthe binding cable 11 from the take up drum 3 on to the hub 2. A holdback brake may be located within the transmission resisting the rotationof the take up drum 3, maintaining the binding cable in a tautcondition.

When the bristles are being removed from the hub 2, the shaft 4 isallowed to idle while the take up drum 3 is driven by the transmission.Our invention primarily consists of providing a bristle feedingmechanism, comprising a feeding table 12 having upstanding sides formingvertical guides, as best shown in Fig. 3. This feedthe end 20 of thefeeding table 12 and their extremities 22. These bars have idler rollers23 journalled to their outer ends in a vertical position. A pair of feedbelts 24 are trained about these pulleys at their one end and about thehorizontal rollers 25 at their opposite ends.

The rollers 25 have sprockets or pins 26 formed thereon and adapted toregister with the holes 27 throughout the length of the belts. Thesesprockets maintain the belts in timed relation to one another. Extendingupward- 1y on the top run of the belts 24 are pins 28, between which thebrush bristles 29 are aligned and conveyed. The feed belts 24 are drivenby the rollers or sprockets 25, from a motor 30, power transmission box31 and belt 32 in the direction of the arrow (Fig. 4).

In the operation of our bristle feeding mechanism, the bristles 29 areplaced between the pins 28 on top of the belts 24 at the point indicatedby numeral 33, Figure l. The bristles are carried by the beltsunderneath the bristle binding cable 11, which forces the central pointof the said bristles down between the belts 24 and into the bristlegroove 19 of the hub 2, as best illustrated in Figures 1, 2 and 4.

The belts 24 follow the twist of the flat bars 21 coming to a verticalposition when they finally reach the idler rollers 23. As the bristlesare forced down between the belts by the cable 11, the pins 28 hold theends of the bristles parallel and opposite to one another so that as thecentral portion of the bristles are forced into the grooves 19 by thebinding cable 11 they will be in their proper radial position from thehub 2. Without maintaining the accurate transverse position of thebristles to the belts throughout the length of the belts, the bristleswould not enter the grooves 19 in the proper relative position,therefore the primary object of designing the feeding mechanism asillustrated is to maintain this proper bristle position while beingapplied to the grooves of the hub.

A special guide, comprising a semi-circular rod 34 prevents the bristleshaving been applied to the hub from getting into the path of thebristles being applied to the groove. This guide begins at 34A ending upat 34B being supported by the feeding table as best illustrated inFigure 4. The bristles are applied to the top of the surface of the beltat the point 33 in the desired amount to wind the hub with the desireddensity of bristles.

We consider the principle of feeding the bristles under the bindingcable by a pair of belts which are moved from a horizontal plane to avertical plane maintaining the end of the bristles having been foldeddown into the grooves by the binding cable opposite to one another untilthey have been completely bound into place, and the method by which itis possible to control the position of the bristles while being appliedto the grooves of the broom drum are the outstanding features of ourinvention.

We have only illustrated the relative position of the bristles as beingapplied to the drum and have not attempted to show the complete densityof the bristles as would ordinarily be applied. This we have done forthe convenience ofillustrating the principle of the feeding mechanism inapplying the bristles to the grooves.

What we claim is:

l. A broom making machine comprising means for supporting a broom hubhaving a spiral groove on its periphery, a drum to receive cord to bewound in the spiral groove of a hub, the drum being spaced from andmounted above the horizontal plane of the means for supporting the broomhub, a pair of guides located below the drum and above the means forsupporting the broom hub, said guides being fiat at their forward endsand twisted at an angle of 90 degrees at their rear ends, belts forcarrying bristles under a cord being wound on a broom hub, means forguiding the belts against the surfaces of the guides, wherebyhorizontally disposed bristles passing under said cord and engagedthereby are gradually bent from a horizontal position and radiallydisposed to said hub and held by the cord in the spiral groove, afeeding table integral with the forward ends of said guides, means fortransversely moving the table and the guides as the cord and bristlesare applied to said broom hub, and means for retarding the rotation ofsaid drum to place tension on the cord so that the cord will draw broomstraw into the spiral groove on said broom hub.

2. A brush making machine comprising a frame, means on the frame forsupporting a broom hub having a continuous spherical spiral groove, acord carrying drum spaced from the hub supporting means, a flat tablein-. terposed between the hub supporting means and the drum, the flattable having upstanding sides forming vertical guides, the rear end ofthe flat table having spaced-apart guides which extend over and beyondthe broom hub, said latter guides being gradually twisted from the endportion of the flat surface of the table to a 90 degree angle at theirfree ends over the broom hub, the space between the guides taperingtoward the free ends of the guides, horizontally disposed guide rollersat the forward end of the flat table, vertically disposed rollers at therear ends of the guides beyond and over the hub supporting means, flatbristle conveying belts trained around the rollers to receive and conveybristles from the flat table under the cord fed from the drum to thegroove in the hub, whereby when bristles are placed transversely overthe belts on the flat belts passing over the table and between the sideguides on the table, they will be carried to the twisted guides and bentdegrees and conveyed under the cord and through the space between saidtwisted guides to the broom hub, and means between the hub supported onthe hub supporting means and the drum to transversely move the table atthe same speed as the cord and bristles are fed to the groove in theperiphery of the hub.

3. A broom making machine as defined in claim 2, wherein the conveyorbelts are provided with pins to engage the transversely arrangedbristles and convey same between the upstanding sides of the flat tableto and under the cord while said bristles are being bent at an angle of90 degrees between the twisted portions of the guides.

4. A broom making machine as in claim 1 wherein a guide means is mountedadjacent said broom hub and coacting with the spiral groove on saidbroom hub prevents the broom straws applied to said broom hub frominterferring with the broom straws being applied to the groove.

5. A broom making machine as in claim'l wherein the means fortransversely moving the table and the guides comprises a bracket mountedon said table intermediate of said guides and a wheel supported by saidbracket which is adapted to engage the spiral groove in the broom hub tomove the table and guides in transverse relation to said broom hub.

References Cited in the file of this patent UNITED STATES PATENTSPlumeau July 6, 1943

